import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home.vue'

Vue.use(Router)

const router = new Router({
  routes: [
    // 访问根目录,重定向到login页面
    {
      path: '/',
      redirect: '/login'
    },
    {
      path: '/login',
      component: Login
    },
    {
      path: '/home',
      component: Home
    }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  /**
   to:将要访问的路径
   form:从哪个路径跳转而来
   next:是一个函数,表示放行
   next()  放行   next('/login')  强制跳转
   */
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
